Typewriting machine



Feb. 25, 1930. w. F. HELMOND 1,748,549

' TYPEWRITING momma Filed March 25, 1929 /nvenf0r: 9

1 Affom Patented Feb. 25, 1930 WILLIAM F. HELMonng" oF-wEsT- HARTFORD,connncrrcnr; ASSIGZNQR re: Tinnitus.-

. pwoon'nnnr'orr FrsHn'nooMrnNY, on NEW YORK',.IN7. Y2, ACORPQRATIONOI"rrrnwm'rme MACHINE "Application. filed. March- 25, 1929;. Serial No... 819;6-22.

This; invention relates to: ineails for retating spoolsfor typevvritingmachines, and

includes features that" afford advantages;

Where the ribbon is hooked: onto the spool- The. tWo metalheads orflanges of: the

spool are connected by meansof acorev which is made of. sheetemetal,having tongues which extend through perforations formed. in thespool-flanges. Thesetonguesare bent. down to fasten the flanges to thecore,.and also to retain the core itselfin. its cylindrical form.

The hook is usually attached by a protruding rivet or head,Which'projeets freinthe samesideof thelri-bbonasdoes-thehook- Anobjection hasheretofore existed, that the pro-- 1 truding. head of thehook-rivet has ridden upon the body of the core, forcing thexhook tostand out from the-core,;Whi,ch Was-an objection, makingtheribbon-windings un even, and also tendingto cause some. portions of thewindings to be tightand. othersloosei In the improved spool the core hasprefer- 1 ably five openings or 1 perforations that are spaced. to.correspond. With the"- length of the the hook falls into. the. adjacentholeinv the v l-f'o'und to. vwrap; and Wind even-Iynpon the hook on therivet... In attaching the ribbon, the hook-end is dropped between theflanges, and the hookenters one of the perforations. in the core, andthenthe ribbon is wrappedxaround' the core-,- and. during'this operationthe rivethead 051T protuber ance upon spool' core... ThGIQ ZEO-ITGY the.ribbonwill. be

spool; thus overcoming. thev objectionthat the hook at: one jendhasbeen. forced to stand I awayfronn the; core, on, account. ofthe sameprotuberance riding upon the, surface of the core. The book itself maybe curved, so. ,as -to"conform to the curvature/of the core.

Thespool may be held in thehand infany position for-"the purpose. ofattaehin-g. theribbon; sinceth'ere are manyjof these catch-f holes inthecore,fand thefhook may enter any o'neof themlwith the result alreadydescribed, thus .facilitatingthe operation of Windingthe ribbon ontothespool.

The aforesaid small perforations; in

i I spool-flanges may be elongated radially, and

thus serve to admit the guiding tongues of thetool Which presses downthe core-tongues may enter into anyone ofisa'i'd. perforations,

sions of the perforations are subseq uently 'uponthespool-flanges.These. radial extenl-i used in drivi'ngthe spool, becausethe dr1v-f ingpin or crank-Wrist upon; the. spool-shaft thus. facilitating the:attachment. of the spool to thedrivi'ng shaft... r p

In the center; of the spool. the. flanges are connected by a, tubularthimbl e'orhubpwhich is riveted over the; and fitsdbwn upon the upperend-of, the Winding shaft in the typrewriten.

Other features and advantages willf hereinafter appear. Y

In theaccolnpanyi' ings Figure" lis a disassembled view of the inn:

proved ribbon-spool of the present invention. Figure 21 is a bottomperspective view of the ribbon-spool shoivnjin Figure 1. j Inthis iewthe. spool is shown in position to be I assembled on an Underwoodtypewritintg machine. 1

V Figure 3. is

a sectionthrough the-spool.

across a core connecting the two spool-heads.

Figure is a fragmentary diagrammatic View of my improved spoolillustrating one step in the process; of its construction.

shown in Figure 2', the section being; taken Figure 5 is a.cross-sectionalview' of the I spool' shovvn in Figure 2-, .thespoolbeing. 2%

shown. attached in operative position on an Underwoodtypewritingmachine.

In carrying out the present invention, a

ribbon-spool generally designated aSQ-TO i'sY provided with'tvvo'spoolheads orflanges 1L1 stened' together hy a co re'l 2, theconstrucinafter. Eachof the spool-heads I1 is arranged vvith' an axi-al -hole13' for receiving a: tubular thimble or bushing I4 which may befastened-to the sp0o1-heads lfby riveting; as illustratedinFigure; 5-.It will be noted. that the bushing 14 is made from a single piece ofsheet-metal curved to form a substantial tube. The spool-heads 11 mayeachbe provided 16;? Each er the spool-head's 11 winalso have tionoflvvhi-ch will bedescribed in data-"11 herefive apertures 17 spacedequally distant from the hole 13" and will preferably be spaced '7 apartequally along -th'ejare of a .circlethrough;

with reinforcing-annular ribs 0r'beads15 and I o them. Each of theapertures 17 is preferably made in the form of an elongated hole orslot, the long axis of each slot being disposed on a radial line withrespect to the axial hole 13. The outer end of each slot issquare for apur pose to presently appear. Since the spools 10 will usually bemounted in a typewriting machine in a horizontal plane, the portion ofeach spool-head 11 disposed outwardly from the. apertures 17 is leftsolid to protect a ribbon R wound 011 the spool from dust and otherforeign substances.

The core 12 will preferably be made from cylindrical form. 7 Each end ofthe core 12 will have five outreaching integral tongues 20 of the samewidth as the elongated slots 17 The radius of the core12 measured fromits axis to the outside edge of a tongue 20 will be equal to thedistances from the axis of the hole 13 to the outer end'of an aperture17 The tongues 20 will be spaced apart the same extent of angular are asthe apertures 17. This construction provides for each of the tongues 20to enter one of the apertures 17.

To secure the spool-heads 11 on the core 12, it is only necessary tobend all of the tongues 20'down against the spool-heads 11, which can bedone inexpensively by a punch-press operation as indicated in Figure a.It will be noted that by making the apertures 17 in the form of anelongated slot, spaceis provided for a punch-press tool-element 21 of arelativelylarge size to enter each slot 17 behind each tongue 20 forbending the latter down. This is especially desirable in manufacturingthe spools in large quantities since it secures a much longer life forthe tool which is employed in the operation. It will be notedthat thisattachment ofthe core 12 to the flangeheads 11 provides forfasteningeach flange at five different points each spaced a considerabledistance from the center of the flange. This construction makes foranespecially rigid spool capable of standing considerable abuse. 7

In the construction of the core 12, at the same time the tongues20 areformed in the punch-press, five apertures 25 are punched in the stripfrom which the core 12 is made, and are spaced apart so that when thestrip is curved to a cylindrical form, as noted above, the apertureswill be spaced equal distances apart around the periphery of the spool.lfhe apertures will preferably have the form of a substantial ellipse oregg-shapedhole.

The functions of the five holes 25'will "now be described. Thetypewriter-ribbon R, suitable for being wound on the spool l0','isusually constructed with a concavo-convex metal-fastening member 27riveted to each end of the ribbon. The outerend of the fastening member27 usually has a portion bent inwardly toform a hook 28. A protrudingrivet-head 29 is usually left at its opposite end of the member 27 onthe inner or concaved face of the same. As typewriter-spools haveusually been constructed they had a core with a portion cut away and apin in said cut-out portion extending from one flange to the other forengaging the hook 28. This hook often failed to properly engage the pinin the cut-out portion and would engage an edge of core shell on oneside of the cutout. and the head 29 would come againstthe unperforatedwall of the core, and the ribbon would be unevenly. wound on and unwoundfrom 4 p the core. a strip of sheet-metal curved to a substantial In thepresent invention, the holes 25 are spaced apart a distance so that whenthe hook 28 catches on either side edge of a hole 25, the head 29 willengage in the next following hole 25 in the core 12, and when the ribbonis wound around the'core the fastening member 27 will lie closely upagainst the outer curved periphery of the core and the ribbon will 7wind smoothly over it and will unwindevenly from the spool. This isdesirable since it allows for uniform feeding of the ribbonpast theprinting point.- J

For attaching the ribbon-spool 10 to a typewriting machine, generallydesignated as 30, and which includes an annular rotatablespool-supportingplate-member 31 of a usual kind. anupright pin 32 isfastened in the member 31 at a distance from its axis slightly exceedingthe distance from the axis of the hole 13 to the inner edge of anaperture 17.

Fastened in the rotatable member 31 and extending; downwardly therefromis a spindle ,which may be rotated step by step in a well-known way uponoperation of the typewriting machine. A portion of the spindle 33 isarranged to project upwardly past the upper faceof the spool-supportingmember 31 for engagement in the thimble 14. It can be readily seen byinspection of Figure 5 that the spool 10 may be operatively connected toa typewriting machine by simply placing the a spool over the spindle 33so that the latter engages in the thimble 14 and then rotating the spoolslowly. preferably in a forward direction. until the pin 32 engagesinone of the apertures 37, whereupon the spool will drop down into itsproper operative position.

Variations maybe resorted to within the scope of the invention, andportions of the improvements ma be used without others.

Having thus described invention, I claim: 7

- 1. The combination with a stretch of typewriter-ribbon having a.fastening member secured to eachend. said. members having hooking means.and a ribbon-fastening protuberance on said member. of a ribbon-spoolhaving a tubular core with a. plurality of holes through its shell, eachhole arranged for receiving said hooking means, said holes arranged sothat when said means is hooked in gage the following hole, whereby saidfasteningjmember may lie snugly against the wall'of said core and saidribbon 'maybe eve'nly' wound therearound or unwound therefrom. I k

2. A winding spool for a typewriter inking ribbon that has anattachment-member fastened to each of its ends and that also has aribbon-fastening protuberance on the inner face of each of said members,said spool in cluding two spool-heads, and a hollow core- V memberfastening said spool-heads together and having a plurality of aperturesthrough its shell, each of said aperturesarranged for operativelyreceiving said attachment-mem her to fasten said ribbon to said core,the shell of said corehaving approximately-the same curvature as theconcave curve of said'curved member, said protuberance engaging in oneof said apertures of said core when said attachment-member engages saidcore;

3. In a ribbon-spool of the kind described,- in combination, twocircular spool-heads oppositely disposed in parallel planes, each sspool-head having an axial hole therethrough and a plurality ofelongated slots radially v disposed with respect to said hole, a thimblefor receiving a spindle for mounting said spool on a typewritingmachine, said thimble extending between said axial holes andfastened toeach of said heads, and a tubular ribbon-winding core between saidspoolheads, said core having outreaching integral tongues on each end,one for each of said elonshell for the V i WILLIAM LHELMoNn.

gated slots in the adjacent spool-head, one of said tongues at each endof said core arranged 1 for passing through one of said slots and be ingbentdown against the outer face of the adjacent spool-head, said corehaving a plurality of ribbon-fastening apertures in its purpose setforth.

